OLIMEX© 2015
A10-OLinuXino-LIME user's manual
2.3 Powering the board
There are three possible ways of powering A10-OLinuXino-LIME – via external supply providing
5V DC at the power jack, from 5V USB port via USB_OTG connector or from 3.7V Li-Po battery
via the LIPO_BAT. Note that the board might consume up to 650mA of current at 5V when there
are no peripherals connected to the USB hosts. Make sure your power supply is able to provide at
least 1A before. Depending on your preferred way of powering you might need additional hardware.
Important: Not all USB ports would be able to provide enough power for the board. Try using
another USB port/USB hub or a cable of higher quality.
If you have an LCD display connected to the board or external 2.5'' hard disk then the USB will
NOT be sufficient source of power.
The best practice is to never count on the mini USB-OTG as a single source of power for the board!
The preferred way of powering the board is via the PWR jack with 5V DC. This would make the
board fully powered and able to power all the peripherals connected to it.
Note that when powering the board from the USB_OTG, the current provided might be insufficient
to also power a bigger LCD connected to the LCD_con. However, this power option is capable of
driving the board when using external display connected to the HDMI connector.
The typical consumption of A10-OLinuXino-LIME is between 400mA and 750mA depending on
the current load.
If the board has entered power-down state you can bring it back without restart using the
PWR_BUT. The PWR_BUT is also used to start the board when powered from a Li-Po battery on
the battery connector.
Sometimes when starting Android it is possible the board to enter battery save mode even before
booting fully. Especially, if you have turned off the board without quick boot mode enabled. In this
case you should press the PWR button for at least 5 seconds which would allow the board to start.
For the European customers we sell two power supply adapters, please check chapter 2.2. We also
sell USB OTG to USB type A cables if you lack such.
The default username/password combination for the default Linux image on the SD card (if
purchased) is: root/olimex.
Note that it is normal that when the board is powered some integrated circuits might appear hotter
than others. This is perfectly normal for some chips – for instance – voltage regulators and the main
processor.
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